CN104045092A - Method for preparing activated kaolin by washing kaolin with water - Google Patents
Method for preparing activated kaolin by washing kaolin with water Download PDFInfo
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- CN104045092A CN104045092A CN201410301778.6A CN201410301778A CN104045092A CN 104045092 A CN104045092 A CN 104045092A CN 201410301778 A CN201410301778 A CN 201410301778A CN 104045092 A CN104045092 A CN 104045092A
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- kaolin
- ore pulp
- filter cake
- alukalin
- water
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical class O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 239000005995 Aluminium silicate Substances 0.000 title claims abstract description 147
- 235000012211 aluminium silicate Nutrition 0.000 title claims abstract description 147
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005406 washing Methods 0.000 title abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000012065 filter cake Substances 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 32
- 239000007787 solid Substances 0.000 claims description 28
- 238000007725 thermal activation Methods 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- 241000931143 Gleditsia sinensis Species 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000003915 liquefied petroleum gas Substances 0.000 claims description 10
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 10
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 9
- -1 boric acid ester Chemical class 0.000 claims description 9
- 238000005054 agglomeration Methods 0.000 claims description 8
- 230000002776 aggregation Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000007701 flash-distillation Methods 0.000 claims description 8
- 238000003837 high-temperature calcination Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 235000009508 confectionery Nutrition 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 238000004061 bleaching Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 21
- 239000000945 filler Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000654 additive Substances 0.000 abstract description 6
- 230000000996 additive effect Effects 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 5
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910021487 silica fume Inorganic materials 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 229960001866 silicon dioxide Drugs 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention belongs to the technical field of the production process of activated kaolin and in particular relates to a method for preparing activated kaolin by washing kaolin with water. The method comprises the steps of preparing a kaolin filter cake, preparing kaolin dry powder, thermally activating kaolin, and preparing activated kaolin by performing depolymerization and modification on the thermally activated kaolin. Deep treatment is performed on kaolin resources by use of processes such as appropriate-temperature calcination, efficient depolymerization and dispersion and modification on the basis of the traditional treatment process of washing the kaolin with water, therefore, the activated kaolin having the characteristics of volcanic ash can be prepared; the activated kaolin can be applied to the fields such as a high-grade concrete additive, a cable filler, a water-based coating and the like, and has the characteristics of short setting time, high early strength, shrinkage compensation, no corrosion to reinforcements, high resistivity and the like; as a result, the valued added of the kaolin resources can be increased, and the activated kaolin has enormous market space potential.
Description
Technical field
Invention belongs to the technical field of producing of alukalin, relates in particular to a kind of processing method that kaolin is prepared alukalin that washes with water.
Background technology
China is kaolin resource big country, and especially there is abundant kaolin resource Period In Maoming Area, but also in urgent need of strengthening aspect the efficient utilization of kaolin resource and novel material exploitation.At present, the purposes of water-washed kaoline mainly concentrates on papermaking, paint filler and Production of Ceramics raw material.In recent years due to heavy and light calcium carbonate successfully for paper production and show superior performance, for kaolin, in the application of paper industry, bring huge challenge; On the other hand, kaolin has huge application potential at building engineering field.
In recent years, alukalin assists gelatinous material research abroad just increasingly active with application as the high reactivity of new generation of cement concrete engineering; Although and have at home some research work, very rare in engineering application.For production technology and the industrialized implementation of alukalin, especially rarely seen report.
The production of tradition water-washed kaoline is mainly by hydrocyclone desanding, classification, ultra-finely delaminates, the explained hereafter kaolin product such as filter-press dehydration; Coaseries kaolin is generally the associated mineral of coal, contains part organic impurity, need brighten production technique through pulverizing ultra-fine and calcining.Kaolin, under different temperature condition, can undergo phase transition the material that generates different qualities.
Summary of the invention
For solving the deficiencies in the prior art, a kind of processing method of preparing alukalin with water-washed kaoline of the present invention, the method is calcined through proper temperature on the basis of water-washed kaoline conventional machining process, the techniques such as efficient depolymerization dispersion are carried out deep processing to kaolin resource, can prepare and there is volcanic ash characteristic and alukalin, can be used as high-end concrete additive, the fields such as cable filler, there is time of coagulation short, early strength is high, compensate for shrinkage, to reinforcing bar non-corroding, resistivity high, promote kaolin resource added value, the market space has a high potential.
Wash kaolin with water and prepare a processing method for alukalin, comprise the following steps:
1) the kaolin ore pulp that is 10～15% by the solid content after selected desanding, by hydrocyclone, sleeping spiral shell grading machine centrifugal classification, reaches more than 85% the content of 2 microns of following particles of kaolin ore pulp; Recycling video disc water extracter is concentrated into 20～25% by kaolin ore pulp solid content; The filter cake that is 64～67% to solid content by concentrated ore pulp press filtration.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 200pa～-100pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%.
3) using biological particles as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 700～900 ℃, calcination time is 1.5～2 hours, obtains thermal activation kaolin.
Wherein, biological particles be biomass fuel rice husk,, the block environmental protection new forms of energy that produce through processing of corn cob, oil tea shell, cotton seed hulls and " three surplus things ".
4) to step 3) the thermal activation kaolin that obtains adds properties-correcting agent Chinese honey locust powder, and depolymerization, and the caking of the agglomeration of the generation while eliminating high-temperature calcination, obtains the alukalin as concrete additive.The weight percent of described Chinese honey locust powder consumption and described alukalin is 3～5%.Chinese honey locust powder, spaonin powder, plays modifying function.
Preferably, described step 3) the described calcining temperature in is 750～850 ℃, and calcination time is 75min～100min.
Preferably, in described step 4) in solution collecting process in the Chinese honey locust powder consumption and the kaolinic weight percent of described thermal activation that add be 3～5%.
Wash kaolin with water and prepare a method for alukalin, comprise the following steps:
1) the kaolin ore pulp that is 10～15% by the solid content after selected desanding, by hydrocyclone, sleeping spiral shell grading machine centrifugal classification, reaches more than 85% the content of 2 microns of following particles of kaolin ore pulp.Utilize 98% vitriol oil to regulate pH values of pulp to 2.0～3.0, add 5～8 ‰ vat powders (V-Brite B) and stir bleaching, control whiteness more than 85%.Recycling video disc water extracter is concentrated into 20～25% by kaolin ore pulp solid content.The filter cake that is 55～60% to solid content by concentrated ore pulp press filtration.In stirringization stock tank, the sodium polyacrylate solution that is 10% by the Sodium hexametaphosphate 99 of described filter cake, described filter cake 4wt～5wt ‰, quality percentage composition is mixed, and in wherein said sodium polyacrylate solution, the weight percent of sodium polyacrylate and described filter cake is 2～3 ‰.And take the sodium hydroxide solution that quality percentage composition is 40% and regulate the rear stirringization slurry of pH to 6.0.Change after slurry through grinding, delaminating, make the 90wt～95wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for the ore pulp after described filter cakeization slurry in the ore pulp after described filter cakeization slurry, by ore pulp press filtration to the solid content through grinding, delaminating, be 64～67% again, obtain kaolin filter cake.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 200pa～-100pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%.
3) using Sweet natural gas or liquefied petroleum gas (LPG) as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 700～900 ℃, calcination time is 1.5～2 hours, obtains thermal activation kaolin.
4) by step 3) the described thermal activation kaolin that obtains adds 1.5～2.5% boric acid ester coupler in separating collecting process, the agglomeration of the generation while eliminating high-temperature calcination lumps and increases kaolin powder surfactivity, obtains the alukalin as fields such as cable filler, aqueous paints.
Preferably, described Sweet natural gas or 750～850 ℃ of high-temperature flue gas of liquefied petroleum gas (LPG) clean energy burning generation, the calcined kaolin 75min～100min of utilizing described step 3).
Preferably, the boric acid ester coupler that adds hot alukalin 2% described step 4) in separating collecting process is prepared the Application Areas alukalins such as cable, aqueous paint.
Beneficial effect of the present invention is:
The kaolin that washes with water provided by the present invention is prepared the processing parameters such as the processing method of alukalin is suitable to find out, the kaolin calcination temperature optimized, the residence time, in efficient depolymerization dispersion process, realize alukalin modification, prepare high reactivity kaolin.And this processing method both can have been take biological particles and gone out take the concrete additive that kaolin is major ingredient as fuel production, the Sweet natural gas of can usining again goes out the highly pure active kaolin cable filler as cable filler as fuel production.
Take biological particles during as fuel, after biological particles burning, can residual silicon-dioxide.This part of silicon-dioxide can be used as useful composition, can be introduced in kaolin, and no longer need other operating process after combustion processes, and the amount of introducing can reach 3 ‰～5 ‰ of the kaolinic weight that obtains after calcining.And the content SILICA FUME of the silicon-dioxide of introducing, silicon-dioxide, as good material, can be widely used in the industries such as chemical industry, metallurgy.For cement or concrete, can improve cement or concrete performance, preparation has superelevation, strong high, wear-resisting, resistance to erosion, corrosion-resistant, impermeabilisation, special concrete or the complex cement that freeze proof, morning is strong, to adapt to the particular requirement of the engineerings such as reinforcing oil well, marine oil field drilling unit, sea port dock, railroad bridge motorway, airport runways, tunnel and urban skyscraper.1. SILICA FUME the reinforcement of concrete is in Hydraulic and Hydro-Power Engineering, can improve the domestic and international traditional macromolecular materials such as the multiplex epoxy mortar of abrasion-resistant material of abrasion resistance of engineering, though this class material abrasion resistance is good, but because itself linear expansivity is several times as much as substrate normal concrete, bad with base concrete thermal adaptation, under natural climate condition, easily cracking comes off, and construction is complicated, toxic, cost is expensive, can not large scale application.And the concrete of use SILICA FUME modification, anti-impact abrasion ability doubles left and right, and the abrasion resistance of anti-48m/s flow velocity level improves more than 3 times.2. SILICA FUME the reinforcement of concrete, in hydro project, can improve the resistance to cleavage the concrete crack of water conservancy project of engineering, and 3. SILICA FUME concrete can improve anti-permeability performance and anti-salt erosion performance, protection reinforcing bar.In underwater engineering, because chlorion infiltrates in concrete, cause reinforcing bar Accelerated corrosion, concrete delamination, the life-span is short, destructive serious.Underwater concreting generally adopts tremie method, and due to scattering and disappearing of grout, Shi Qiyu basic unit can not finely bond, and the intensity of reduction and water contact part.In concrete, mix under water after SILICA FUME, these problems all can obtain significantly and improve.4. SILICA FUME the reinforcement of concrete is built robbing of traffic highway road surface, has extremely strong antiwear characteristic.On the whole, the market space has a high potential.
Take Sweet natural gas or liquefied petroleum gas (LPG) during as fuel, owing to generating the gases such as water and carbonic acid gas after full combustion of fuel, impurity that can residual harmful, thus obtain the high-grade kaolin that purity is higher, and use as cable filler.Cable filler has higher requirement to electric conductivity.If be introduced as the solid impurities such as carbon of after-flame after fuel combustion, will have influence on the electric conductivity of filler, thereby have influence on quality product.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
1) by solid content, be that the pH value of 57% kaolin raw ore ore pulp is adjusted to 6.0 and add Sodium hexametaphosphate 99 and sodium polyacrylate dispersion agent, in described Sodium hexametaphosphate 99 and sodium polyacrylate and described kaolin raw ore ore pulp, kaolinic weight percent is divided into 5 ‰ and 2 ‰, stirring slurry.After stirringization slurry, ore pulp is ground, delaminated in super grinder, and further filter-press dehydration to solid content is 65%, obtains kaolin filter cake.Wherein, the 95wt% of granularity kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin raw ore ore pulp in described kaolin raw ore ore pulp.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter swirler, swirler overflow ore pulp is again via sleeping spiral shell grading machine centrifugal classification, and kaolin granularity can be controlled to two microns of following content more than 85%.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 150pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%;
3) using Sweet natural gas as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 750 ℃, calcination time is 1.5 hours, obtains thermal activation kaolin;
4) to step 3) the thermal activation kaolin that obtains adds properties-correcting agent boric acid ester coupler, the weight percent 2% of described boric acid ester coupler consumption and described alukalin.And break up, depolymerization, the agglomeration of the generation while eliminating high-temperature calcination lumps and makes kaolin powder surface active, obtains pulverous alukalin.Alukalin can be used for the fields such as cable filler, washing paint filler.
Embodiment 2
1) by solid content, be that the pH value of 57% kaolin raw ore ore pulp is adjusted to 6.0 and add Sodium hexametaphosphate 99 and sodium polyacrylate dispersion agent, in described Sodium hexametaphosphate 99 and sodium polyacrylate and described kaolin raw ore ore pulp, kaolinic weight percent is divided into 5 ‰ and 2 ‰, stirring slurry.After stirringization slurry, ore pulp is ground, delaminated in super grinder, and further filter-press dehydration to solid content is 65%, obtain kaolin filter cake, wherein, the 95wt% of granularity kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin raw ore ore pulp in described kaolin raw ore ore pulp.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter swirler, swirler overflow ore pulp is again via sleeping spiral shell grading machine centrifugal classification, and kaolin granularity can be controlled to two microns of following content more than 85%.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 150pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%;
3) using liquefied petroleum gas (LPG) as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 750 ℃, calcination time is 1.5 hours, obtains thermal activation kaolin;
4) to step 3) the thermal activation kaolin that obtains adds properties-correcting agent boric acid ester coupler, the weight percent 2% of described boric acid ester coupler consumption and described alukalin.And break up, depolymerization, the agglomeration of the generation while eliminating high-temperature calcination lumps and makes kaolin powder surface active, obtains pulverous alukalin.Alukalin can be used for the fields such as cable filler, washing paint filler.
Embodiment 3
1) the kaolin ore pulp that is 12% by the solid content after selected desanding, by hydrocyclone, sleeping spiral shell classification, reaches more than 85% 2 microns of following content of kaolin ore pulp; Recycling video disc water extracter is concentrated into 25% by kaolin ore pulp solid content; The filter cake that is 65% to solid content by concentrated ore pulp press filtration.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter swirler, swirler overflow, ore pulp is again via sleeping spiral shell grading machine centrifugal classification, and kaolin granularity can be controlled to two microns of following content more than 85%.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 150pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%.
3) using biological particles as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 750 ℃, calcination time is 1.5 hours, obtains thermal activation kaolin.
4) to step 3) the thermal activation kaolin that obtains adds properties-correcting agent Chinese honey locust powder, and the weight percent of described Chinese honey locust powder consumption and described alukalin is 4%.And break up, depolymerization, the caking of the agglomeration of the generation while eliminating high-temperature calcination, obtains pulverous alukalin.Alukalin can be used as concrete additive.
Embodiment 4
1) the kaolin ore pulp that is 15% by the solid content after selected desanding, by hydrocyclone, sleeping spiral shell grading machine centrifugal classification, reaches more than 85% 2 microns of following content of kaolin ore pulp; Recycling video disc water extracter is concentrated into 20% by kaolin ore pulp solid content; The filter cake that is 65% to solid content by concentrated ore pulp press filtration.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter swirler, swirler overflow, ore pulp is again via sleeping spiral shell grading machine centrifugal classification, and kaolin granularity can be controlled to two microns of following content more than 85%.
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 120pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%.
3) using biological particles as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 800 ℃, calcination time is 1.5 hours, obtains thermal activation kaolin.
4) to step 3) the thermal activation kaolin that obtains adds properties-correcting agent Chinese honey locust powder, and the weight percent of described Chinese honey locust powder consumption and described alukalin is 5%.And break up, depolymerization, the caking of the agglomeration of the generation while eliminating high-temperature calcination, obtains pulverous alukalin.Alukalin can be used as concrete additive.
The foregoing is only better embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. wash kaolin with water and prepare a processing method for alukalin, comprise the following steps:
1) preparing solid content is 63～66% kaolin filter cake, in described kaolin filter cake more than the 85wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin filter cake;
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 200pa～-100pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%;
3) take the high temperature clean flue gas calcining step 2 that biological particles produces as thermal source burning) resulting kaolin dry powder, calcining temperature is 700～900 ℃, calcination time is 1.0～2.0 hours, obtains thermal activation kaolin;
4) by step 3) resulting described thermal activation kaolin carries out depolymerization, in separating collecting process, add Chinese honey locust powder as properties-correcting agent, the caking of the agglomeration producing while eliminating high-temperature calcination, obtain alukalin, wherein, described Chinese honey locust powder consumption and the kaolinic weight percent of described thermal activation are 3～5%.
2. according to claim 1ly wash the processing method that kaolin is prepared alukalin with water, it is characterized in that, the preparation method of the kaolin filter cake described step 1) is: the kaolin ore pulp that is 10～15% by solid content carries out classification and sedimentation, more than making the 85wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin ore pulp in described kaolin ore pulp, kaolin ore pulp being concentrated into solid content is again 20～25%, by the kaolin ore pulp press filtration after concentrated, obtain described solid content and be 63～66% kaolin filter cake.
3. according to claim 1ly wash the processing method that kaolin is prepared alukalin with water, it is characterized in that: the described calcining temperature described step 3) is 750～850 ℃, calcination time is 75min～100min.
4. according to the arbitrary described processing method that kaolin is prepared alukalin that washes with water of claims 1 to 3, it is characterized in that: in described step 4) in solution collecting process in the Chinese honey locust powder consumption and the kaolinic weight percent of described thermal activation that add be 3～5%.
5. wash kaolin with water and prepare a method for alukalin, comprise the following steps:
1) preparing solid content is 64～67% kaolin filter cake, the 90wt～95wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin filter cake in described kaolin filter cake;
2) by step 1) flash distillation, dry under the-micro-condition of negative pressure of 200pa～-100pa of the kaolin filter cake that obtains, obtain water ratio at the kaolin dry powder below 1.5%;
3) using Sweet natural gas or liquefied petroleum gas (LPG) as combustion medium calcining step 2) resulting kaolin dry powder, calcining temperature is 700～900 ℃, calcination time is 1.5～2 hours, obtains thermal activation kaolin;
4) by step 3) the described thermal activation kaolin that obtains carries out depolymerization, in separating collecting process, add boric acid ester coupler, the agglomeration of the generation while eliminating high-temperature calcination lumps and increases kaolin powder surfactivity, obtain alukalin, wherein, the consumption of described boric acid ester coupler and the weight percent of described hot alukalin are 1.5～2.5%.
6. according to claim 5ly wash the method that kaolin is prepared alukalin with water, it is characterized in that, the preparation method of the described kaolin filter cake described step 1) is: the kaolin ore pulp that is 10～15% by solid content carries out classification and sedimentation, more than making the 85wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for described kaolin ore pulp in described kaolin ore pulp, the vitriol oil that the quality percentage composition of take is again 98% regulates pH to 2.0～3.0 of described kaolin ore pulp, the V-Brite B that adds described kaolin ore pulp solid content 5wt～8wt ‰ stirs bleaching, control whiteness more than 85%, kaolin ore pulp being concentrated into solid content is again 20～25%, by the kaolin ore pulp press filtration after concentrated, obtain solid content and be 55～60% filter cake, by described filter cake, the Sodium hexametaphosphate 99 of described filter cake 4wt～5wt ‰, quality percentage composition is 10% sodium polyacrylate solution mixing, in wherein said sodium polyacrylate solution, the weight percent of sodium polyacrylate and described filter cake is 2～3 ‰, and take the sodium hydroxide solution that quality percentage composition is 40% and regulate the rear stirringization slurry of pH to 6.0, change after slurry through grinding, delaminate, make the 90wt～95wt% of particle diameter kaolin particle in the content of the kaolin particle below two microns accounts for the ore pulp after described filter cakeization slurry in the ore pulp after described filter cakeization slurry, again will be through grinding, the ore pulp press filtration of delaminating to solid content is 64～67%, obtain kaolin filter cake.
7. according to claim 5ly wash the method that kaolin is prepared alukalin with water, it is characterized in that: the described calcining temperature described step 3) is 750～850 ℃, calcination time is 75min～100min.
8. according to the arbitrary described method that kaolin is prepared alukalin that washes with water of claim 5 to 7, it is characterized in that: the consumption of boric acid ester coupler and the weight percent of described hot alukalin that in separating collecting process, add described step 4) are 2.0%.
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